SEWER PIPE BEDDING AND SAND BLANKET:
Sewer pipe bedding and sand blanket shall be as specified in Section 02300 EARTHWORK.
DUCTILE IRON PIPE:
Ductile iron pipe shall be used at sewer/water line crossings and conform to AWWA
C151/A21.50 & 51, Class 52.
PART 3 - EXECUTION
3.01
A.
G.
INSTALLATION:
Except as modified herein, installation of the PVC pipe shall be in accordance with ASTM
D2321.
Each pipe length shall be inspected before being laid to verify that it is not cracked. Pipe shall be
laid to conform to the lines and grades indicated on the drawings or given by the Engineer. Each
pipe shall be so laid as to form a close joint with the next adjoining pipe and bring the inverts
continuously to the required grade.
The pipe shall be bedded and covered with sand blanket as specified under Section 02300,
EARTHWORK, and as detailed on the project plans.
The pipe shall not be driven down to grade by striking it with a shovel handle, timber, rammer, or
other unyielding object. When each pipe has been properly bedded, enough of the backfill
material shall be placed and compacted between the pipe and the sides of the trench to hold the
pipe in correct alignment.
Before a joint is made, the pipe shall be checked to assure that a close joint with the next
adjoining pipe has been maintained and that inverts are matched and conform to the required line
and grade.
For pipe placed on crushed stone, immediately after the joint is made, the jointing area shall be
filled with suitable materials so placed and compacted that the ends of either pipe will not settle
under backfill load.
No pipe or fitting shall be permanently supported on saddles, blocking, or stones.
Branches and fittings shall be laid by the Contractor as indicated on the drawings, and/or as
directed by the Engineer. Open ends of pipe and branches shall be closed with PVC caps secured
in place with pre-molded gasket joints or as directed by the Engineer.
All pipe joints shall be made as nearly watertight as practicable. There shall be no visible
leakage at the joints and there shall be no sand, silt, clay, or soil of any description entering the
pipeline at the joints. Where there is evidence of water or soil entering the pipeline, connecting
pipes, or structures, the defects shall be repaired to the satisfaction of the Engineer.
2019 CIPPLining Project Polyvinyl Chloride Gravity Pipe and Fittings
Nashua, NH 02085-3
